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Photorefractive Parallel Matrix-Matrix Multiplier Using a Mutually Incoherent Laser Array 利用相互非相干激光阵列的光折变平行矩阵-矩阵倍增器
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me26
John H. Hong, P. Yeh
{"title":"Photorefractive Parallel Matrix-Matrix Multiplier Using a Mutually Incoherent Laser Array","authors":"John H. Hong, P. Yeh","doi":"10.1364/optcomp.1991.me26","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me26","url":null,"abstract":"Wave mixing and holographic recording in photorefractive media have been used to perform parallel matrix-vector multiplication [1]. Although the technique can be extended to perform parallel matrix-matrix multiplication, the implementation requires critical alignment of the matrix elements. In this paper, we propose to demonstrate a novel technique to perform parallel matrix-matrix multiplication which uses the simultaneous formation of multiple gratings in a photorefractive crystal. The concept is shown in Fig. 1 where a simple example is used. The matrices to be multiplied are given by amn and bkl. While all the light sources shown in the figure are of the same nominal wavelength, each source differs from its neighboring source by some frequency δw which is chosen to satisfy δω ≫ 1/τ where τ is the photorefractive response time.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"259 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132579725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Image Correlation Using Photorefractive GaAs 利用光折变砷化镓进行图像相关
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me29
Li-Jen Cheng, Duncan T. H. Liu, K. Luke
{"title":"Image Correlation Using Photorefractive GaAs","authors":"Li-Jen Cheng, Duncan T. H. Liu, K. Luke","doi":"10.1364/optcomp.1991.me29","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me29","url":null,"abstract":"Image correlation can be implemented optically, which takes full advantages of light, namely parallel operation and global interconnection with the Fourier transform provided by lens. Photorefractive compound semiconductors can provide this type of implementation1. This paper presents results from a detailed investigation on potentials of the photorefractive GaAs correlator for practical applications. The results illustrate that the matched filter formation rate in photorefractive GaAs crystal can be higher than 1000 frames per second. The filter contains complex values, leading to high quality correlation as demonstrated. Other advantages verified by experiments include real object image input with no need for preprocessing Fourier transform; edge enhancement automatically processed in the correlation process; dynamic spatial invariance, substantial enhancement of the signal by using a DC electric field providing high dynamic range; and easy alignment. In addition, this paper also presents the result of an experiment on imaging by phase conjugation in GaAs with 1.3 micron semiconductor injection lasers. This result provides realistic potentials to develop compact correlation modules using photorefractive semiconductors with semiconductor lasers. These modules could be building blocks for future \"intelligent\" automatic pattern recognition systems.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"90 13","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113970478","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Progress in Arrays of Opto-Electronic Bistable Devices and Sources 光电双稳态器件与光源阵列研究进展
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.ma1
K. Kasahara, I. Ogura, Y. Yamanaka
{"title":"Progress in Arrays of Opto-Electronic Bistable Devices and Sources","authors":"K. Kasahara, I. Ogura, Y. Yamanaka","doi":"10.1364/optcomp.1991.ma1","DOIUrl":"https://doi.org/10.1364/optcomp.1991.ma1","url":null,"abstract":"With recent progress in semiconductor arrays of opto-electronic bistable devices and sources, highly parallel optical interconnections and information processing has gradually become a reality. The Vertical to Surface Transmission Electro-Photonic device, or VSTEP, is a concept proposed to meet these requirements1). The essential ideas for the VSTEP are electrophotonic interfusion at the device level and the resulting performance efficiency improvements in power consumption and uniformity for two-dimensional matrix integration.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123867086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Demonstration of Colored Optical Interconnects and Implementation of a 2 × 2 Optical Crossbar Switch with Bistable Diode Laser Amplifiers 彩色光互连的演示和双稳二极管激光放大器的2 × 2光交叉开关的实现
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me17
Z. Pan, M. Dagenais
{"title":"Demonstration of Colored Optical Interconnects and Implementation of a 2 × 2 Optical Crossbar Switch with Bistable Diode Laser Amplifiers","authors":"Z. Pan, M. Dagenais","doi":"10.1364/optcomp.1991.me17","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me17","url":null,"abstract":"Bistable diode laser amplifiers have the lowest switching energy of any optical switching devices. Single and double beam usable gains in excess of 50 and 250 respectively have been demonstrated, which implies very large fan out capabilities. These devices have also been shown to be cascadable and can be operated at rates approaching 1 Gbit/s. We have used four of these devices to implement a 2 × 2 generalized nonblocking, optical crossbar switch. Any of the inputs can be connected with any of the outputs. In addition, any of the input channels can be recovered from any particular output channel using the concept of colored optical interconnects.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Hardware Compiler for Digital Optical Computing 数字光学计算的硬件编译器
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.tua2
M. Murdocca, Vipul Gupta, Masoud Majidi
{"title":"A Hardware Compiler for Digital Optical Computing","authors":"M. Murdocca, Vipul Gupta, Masoud Majidi","doi":"10.1364/optcomp.1991.tua2","DOIUrl":"https://doi.org/10.1364/optcomp.1991.tua2","url":null,"abstract":"A hardware compiler for translating descriptions of digital circuits from a hardware description language (HDL) into gate-level layouts is under development at Rutgers University. The layouts are customized for optical processors that make use of arrays of optical logic gates interconnected in free-space with regular interconnection patterns such as perfect shuffles, crossovers, or global interconnects. Specific processors that the hardware compiler supports include the S-SEED based all-optical processor developed at AT&T Bell Labs, the S-SEED based all-optical processor under development at the Photonics Center at RADC/Griffiss AFB, and the acousto-optic modulator based RISC processor under development at OptiComp Corporation.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"135 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125811407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental comparison of different associative memory techniques implemented optically by the same system architecture 同一系统架构下不同光学联想记忆技术的实验比较
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me9
K. Weible, N. Collings, W. Xue, G. Pedrini, R. Daendiker
{"title":"Experimental comparison of different associative memory techniques implemented optically by the same system architecture","authors":"K. Weible, N. Collings, W. Xue, G. Pedrini, R. Daendiker","doi":"10.1364/optcomp.1991.me9","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me9","url":null,"abstract":"In recent years, much work has been going on in the optical implementation of artificial neural network systems. The parallel and crosstalk free interconnection characteristics of optical systems are well suited to exploit fully the desired parallel characteristics of artificial neural networks. The application of these systems as associative memories has been explored in many cases.1-4 To facilitate optical implementation of these neural systems various modifications to the original Hopfield model have been proposed.5 It has been shown both theoretically and experimentally, that the storage and recall capacity of neural systems based on the Hopfield model are not significantly reduced when only the inhibitory (negative) interconnections are used.6,7","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133518290","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A Guided-Wave Acoustooptic Matrix Algebra Processor Module* 导波声光矩阵代数处理器模块*
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.tud3
A. Kar-Roy, C. Tsai
{"title":"A Guided-Wave Acoustooptic Matrix Algebra Processor Module*","authors":"A. Kar-Roy, C. Tsai","doi":"10.1364/optcomp.1991.tud3","DOIUrl":"https://doi.org/10.1364/optcomp.1991.tud3","url":null,"abstract":"Various architectures for implementing matrix algebra processors (MAPs) have been proposed and developed in bulk-wave optical systems(1−7) as well as in integrated optic (IO) devices(8−10) Bulk-wave optical systems have the advantage of an added dimension in implementing 3-D architectures over planar IO devices in which only 2-D architectures are possible. But the IO devices have the potential advantages in terms of drive power requirement, size, robustness, stability and planar technology for mass production. In this paper, we report on a guided-wave acoustooptic (AO) analog MAP module that is capable of implementing high-speed matrix-vector and matrix-matrix multiplications. The architecture, the working principle, and a preliminary MAP constructed on a 1.0 X 10.0 X 28.0 mm3 Y-cut LiNbO3 substrate to demonstrate the multiplication of a 4 X 4 matrix with a 4-element vector, are presented.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"80 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133245147","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
An optoelectronic full adder using: a beam scanning laser diode 一种使用光束扫描激光二极管的光电全加法器
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.me13
H. Itoh, S. Mukai, M. Mori, M. Watanabe, Hiroyoshi Yajimi
{"title":"An optoelectronic full adder using: a beam scanning laser diode","authors":"H. Itoh, S. Mukai, M. Mori, M. Watanabe, Hiroyoshi Yajimi","doi":"10.1364/optcomp.1991.me13","DOIUrl":"https://doi.org/10.1364/optcomp.1991.me13","url":null,"abstract":"The present stage of the integration technology for optoelectronic digital computing systems is primitive, while this technology is essential for the systems to overcome electronic digital computers in the future. For example, an optical full adder is usually composed of several fundamental optical logic gates, and the number of these gates easily amounts to a prohibitive level when such adders are integrated. This difficulty will be relieved if the number of the gates composing an adder is reduced. The reduction of the gates also results in smaller size and higher operation speed of the system.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132793445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Integrated Free Space-Optical Permutation Network 集成自由空间光置换网络
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.mb3
J. Jahns, W. Daeschner
{"title":"Integrated Free Space-Optical Permutation Network","authors":"J. Jahns, W. Daeschner","doi":"10.1364/optcomp.1991.mb3","DOIUrl":"https://doi.org/10.1364/optcomp.1991.mb3","url":null,"abstract":"Permutation networks such as the Perfect Shuffle, the Banyan, and the Crossover network can be used in optical computing or photonic switching to implement parallel algorithms efficiently [1]. Many different implementations for these various networks have been proposed recently; see for example [2-4]. A very flexible way of implementing space-variant permutation networks is by using diffracitve lenslet arrays [5, 6]. The basic concept is to give each optical channel its own miniaturized optical system, consisting typically of two diffractive off-axis lenslets. By controling the angle under which the light beams travel, it is possible to realize arbitrary interconnect schemes. The optical setup for this is shown in Figure 1. Using lithographic techniques, all components in an array can be fabricated at the same time with high alignment precision. In order to achieve high efficiencies diffractive optical elements can be implemented as phase structures with multiple discrete phase levels [7, 8]. A 2-D cyclic shifter was demonstrated recently using lithographically fabricated lenslet arrays [9]. An experimental result is shown in Fig. 2.","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132579384","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Optical Implementation of SELECTION Operation in Database Machines 数据库机器中选择操作的光学实现
Optical Computing Pub Date : 1992-05-22 DOI: 10.1364/optcomp.1991.tuc2
R. Athale, M. Haney
{"title":"Optical Implementation of SELECTION Operation in Database Machines","authors":"R. Athale, M. Haney","doi":"10.1364/optcomp.1991.tuc2","DOIUrl":"https://doi.org/10.1364/optcomp.1991.tuc2","url":null,"abstract":"In its most elemental form, a database can be viewed as a computer-based record keeping system. The database organization is optimized for efficient addition, deletion and updating of the records. Accurate, flexible and efficient techniques for retrieving and organizing data is the objective of a database management system. Applications of such database management systems range from banking and libraries in the commercial world to onboard electronic warefare systems for airplanes and logistics databases for weapons readiness management in the military world. In either domain, the size of the database is constantly growing, while the desired data retrieval time is simultaneously decreasing. In addition, onboard systems may have volume, power and weight limitations while maintaining ruggedness. The recent developments in optical storage, interconnects and switching technologies has initiated investigation into the use of optical technology to enhance the performance of conventional database machines [1].","PeriodicalId":302010,"journal":{"name":"Optical Computing","volume":"44 4","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1992-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114028608","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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